Twyek



UNITED STATES PATENT OFFICE.

WILLIAM T. BARNES, OF BUFFALO, NEW YORK.

TWYER.

Specication of Letters Patent No. 5,682, dated July 25, 1848.

To all 'whom 'it may concern Be it known that I, IVM. T. BARNES, ofBuffalo, in the county of Erie and State of New York, have made certainImprovements in Twyers.

Figure l is a general view thereof, Fig. 2 shows the under side of thecover, Fig. 3 plan of the parts with the cover removed, Fig. l sectionof the air chamber.

The most important desideratum in the formation and arrangement oftwyers yet to be attained is a freedom from being clogged by cinders anddirt. Many attempts have been made to obviate this, but, so far as I amaware, without success. There is another great difficulty in twyers newin use, having an air chamber, owing to the constant liability ofheating the iron plate, composing the upper surface thereof, so as tocause it to warp and become useless whenever the blast from the bellowsis stopped. My construction is intended to correct these defects, and isas follows :--An air chamber A of the form spheroid, has a circularopening in its upper or flattened surface of eight inches, more or less,in diameter, onto which.

a cover D fits. This cover is fastened by means of two hooks, A, thatshut into two notches A2 in the hole above named, when by turning aroundthey are caught, as shown in Fig. 4. In this cover there is a longnarrow fissure, through which the blast is emitted, and this can beturned so as to make what blacksmiths denominate a long or broad fire,according to the work to be done. Directly below the coverjustdescribed, in the bottom of the air chamber, there is an opening oftunnel form, A3, on to which a pipe (c) is affixed, that curves down andoutward to any distance and beyond the side of the furnace that is foundconvenient. In the side of the air chamber, and at right angles to it,there is a pipe B, which is connected with the bellows or fan used forproducing the blast.

In operating this twyer the lower tube (c) may be stopped with thestopper E, and the blast from the bellows enters the air chamber, inwhich there is no angles to obstruct it, the whole interior being clear,and issues through the fissure before described, blowing off all thedirt which tends to accumu late over it, and lodging it on one side, andshould any portion of dirt accidentally fall below the blast, into thetube (C), from whence it is readily cleared, and should anything lodgein the fissure it is forced straight down into the tube by a clearingiron. The top of this twyer being convex, it can at any time be scrapedoff, and all the cinders scraped off by passing a shovel or other ironover it. Then the bellows is stopped, the stopper E is withdrawn fromthe pipe (o), and a current of air is thus introduced through it by therarecation of the air in the air chamber, so as to keep up a gentledraft, enough to keep the said air chamber cool and prevent it meltingdown and warping.

Having thus fully described my improvements in twyers, what I claimtherein as my invention, and for which I desire to secure LettersPatent, is-

The twyer constructed substantially as herein described-that is to say,having a spheroidal air chamber with a convex top and movable cover,through which the blast is blown, and which can be turned to make a longor broad tire at pleasure.

VILLIAM T. BARNES.

Vitnesses:

SELAH BARNARD, H. J. FORD.

